Hi B. -
Congrats on your great milk supply! Glad to hear your LO is doing well.
You've already received some great advice - I just had a couple of links and suggestions for you.
Kellymom.com has a quick reference chart that lists storage times for breastmilk:
http://www.kellymom.com/bf/pumping/milkstorage.html
Also, some women find that even when they store their milk properly that it develops an off odor very rapidly. If you have really handled it correctly, then it isn't bad but it sure does smell and taste awful. This is due to an excess of an enzyme that starts to digest the milk. I'd suggest that you do a test run fairly early on in your pumping process (freeze some and thaw it out the next day and make sure it still smells and tastes ok) to find out if this will be an issue for you. And then check it again periodically - I didn't have a problem with this early on in my lactation, but after nine months I couldn't even leave freshly pumped bottle in the fridge for five hours! If you check it regularly then you won't end up having to toss a significant amount of your liquid gold because it's gone funky (which can be heartbreaking!)
If you do find your milk seems to sour rapidly, it's easy to fix - just scald the milk ASAP after you pump and then freeze normally. That should take care of it. Here's a link that talks about how to scald the milk:
http://www.kellymom.com/bf/pumping/lipase-expressedmilk.html
And be aware that after your LO is about four months old that your breasts will get better at "predicting" how much milk she needs and they will not feel as full because they'll get good at making milk on demand. Since you'll be pumping you'll probably know that there's still plenty of milk, but keep that in the back of your head - as long as your girl is gaining weight and giving you plenty of wet diapers then know that she's getting plenty of milk!